<script lang="ts" setup name="XtxCarousel">
import { BannerItem } from '@/types/data';
import { onMounted, onUnmounted, ref } from 'vue';

const {silder , autoplay = true,duration = 3000 } = defineProps<{
  silder:BannerItem []
  autoplay?:boolean
  duration?:number
}>()

const active = ref(0)
const prev = ()=>{
  active.value--
  if(active.value < 0){
    active.value = silder.length - 1
  }
}
const next = ()=>{
  active.value++
  if(active.value >= silder.length){
    active.value = 0
  }
}
let timerId = -1
const stop = ()=>{
  clearInterval(timerId)
}
const start = () =>{
  if(!autoplay) return
 timerId = window.setInterval(()=>{
    next()
},duration)
} 
onMounted(()=>{
  start()
})
onUnmounted(()=>{
  stop()
})
</script>

<template>
  <div class="xtx-carousel" @mouseenter="stop" @mouseleave="start">
    <ul class="carousel-body">
      <li class="carousel-item"  :class="{fade:active === index }"  v-for="(item , index) in silder" :key="item.id">
        <RouterLink to="/">
          <img
            :src="item.imgUrl"
            alt=""
          />
        </RouterLink>
      </li>
    </ul>
    <a href="javascript:;" class="carousel-btn prev"
    @click="prev"  ><i class="iconfont icon-angle-left"></i
    ></a>
    <a href="javascript:;" class="carousel-btn next"
     @click="next" ><i class="iconfont icon-angle-right"></i
    ></a>
    <div class="carousel-indicator">
      <span 
        :class="{active : active === index}" 
        v-for="(item , index) in silder" 
        :key="item.id"
        @mouseenter="active = index"
        ></span>
    </div>
  </div>
</template>

<style scoped lang="less">
.xtx-carousel {
  width: 100%;
  height: 100%;
  min-width: 300px;
  min-height: 150px;
  position: relative;
  .carousel {
    &-body {
      width: 100%;
      height: 100%;
    }
    &-item {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      transition: opacity 0.5s linear;
      &.fade {
        opacity: 1;
        z-index: 1;
      }
      img {
        width: 100%;
        height: 100%;
      }
    }
    &-indicator {
      position: absolute;
      left: 0;
      bottom: 20px;
      z-index: 2;
      width: 100%;
      text-align: center;
      span {
        display: inline-block;
        width: 12px;
        height: 12px;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 50%;
        cursor: pointer;
        ~ span {
          margin-left: 12px;
        }
        &.active {
          background: #fff;
        }
      }
    }
    &-btn {
      width: 44px;
      height: 44px;
      background: rgba(0, 0, 0, 0.2);
      color: #fff;
      border-radius: 50%;
      position: absolute;
      top: 228px;
      z-index: 2;
      text-align: center;
      line-height: 44px;
      opacity: 0;
      transition: all 0.5s;
      &.prev {
        left: 20px;
      }
      &.next {
        right: 20px;
      }
    }
  }
  &:hover {
    .carousel-btn {
      opacity: 1;
    }
  }
}
</style>